remove implication duo_focus (31684) -> group (536983)
create implication trio_focus (1633) -> group (536983) # duplicate of implication #28681
remove implication threesome (66472) -> group_sex (118051)
remove implication sandwich_position (4493) -> group_sex (118051)
remove implication train_position (2961) -> group_sex (118051)
remove implication triangle_position (900) -> group_sex (118051)
remove implication spitroast (18366) -> group_sex (118051)
remove implication reverse_spitroast (446) -> group_sex (118051)
remove implication collaborative_footjob (300) -> group_sex (118051)